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Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models

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Cutaneous mycobacterial spindle cell pseudotumour.

Geok Chin Tan¹, Yen Piow Yap, Mohd Sidik Shiran

¹Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, 56000, Malaysia.

BMJ Case Reports

|June 21, 2011

Summary

Mycobacterial spindle cell pseudotumour (MSCP) is rare on the skin, often affecting the upper limbs of immunosuppressed individuals. This case highlights the risk of misdiagnosing cutaneous MSCP as sarcoma.

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Area of Science:

Pathology
Dermatology
Infectious Diseases

Background:

Mycobacterial spindle cell pseudotumour (MSCP) is a rare entity reported in various organs.
Cutaneous MSCP is exceptionally uncommon, with a predilection for the upper limbs.
MSCP predominantly affects immunosuppressed individuals.

Purpose of the Study:

To report a rare case of cutaneous MSCP caused by atypical mycobacterium.
To discuss the diagnostic challenges and potential misdiagnosis of MSCP as sarcoma.
To emphasize the importance of considering MSCP in the differential diagnosis of spindle cell lesions in the skin.

Main Methods:

Case report presentation.
Review of relevant literature on MSCP.
Histopathological examination of the cutaneous lesion.

Main Results:

A case of MSCP involving the skin due to atypical mycobacterium was identified.
The lesion presented as a spindle cell proliferation.
Differential diagnoses included various spindle cell lesions, with a risk of misdiagnosis as sarcoma.

Conclusions:

Cutaneous MSCP is a rare manifestation of mycobacterial infection.
Immunosuppression is a significant risk factor for developing MSCP.
Accurate diagnosis is crucial to differentiate MSCP from malignant spindle cell neoplasms like sarcoma.